Sometimes (it is not consistent) when I open a category, it does not display anything below the category, not the sub-categories nor articles. Sometimes it will display one or two, but not the whole thing. I can see the subcategories in Category Contents, but not in the tree.   Here is a picture of what I mean.

Steps to Reproduce

1. Click the right arrow to the left of the category name 2. Hold your breath that it opens the full category.   Sometimes it happens, sometimes it does not. I have not been able to reproduce on demand.   At this moment it is happening to all categories.

Operating System

Browser

Related Entity